Behaviour change after Cefovecin (Convenia) in cats

The FDA has received 603 reports of behaviour change in cats after Cefovecin. That is 6.9% of all reports for this medicine, compared with 5.4% across reports for all cat medicines.

603Reports
41%Marked serious
14%Recovered
22%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
204 41%
1–2 days
131 26%
3–7 days
69 14%
1–4 weeks
58 12%
Over a month
33 6.7%

How the animals did

Recovered
83 14%
Recovered with lasting effects
1 0.2%
Still unwell when reported
202 33%
Died
71 12%
Euthanised
62 10%
Not known
184 31%

Problems reported at the same time

Age of the animals

Under 1 year
28
1–3 years
90
4–7 years
146
8–11 years
156
12+ years
168

About this medicine

Cefovecin a long-acting antibiotic injection.

Products with this ingredient include Convenia. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Cefovecin cause behaviour change in cats?
603 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?
In half of the reports with dates, it started within 1 day of the first dose.
What should I do?
Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Behaviour change with similar medicines

All reported side effects of Cefovecin in cats · Medicines most reported with behaviour change